NumberResearchThousands-blocks in 413-475
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 413-475 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 413 blocks
Most active assignees, all time — NPA 413
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-01-15 | 413-475-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | GREENFIELD | MA |
| 2006-03-09 | 413-475-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | GREENFIELD | MA |
| 2007-04-10 | 413-475-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | GREENFIELD | MA |
| 2004-03-01 | 413-475-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | GREENFIELD | MA |
| 2009-03-16 | 413-475-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | GREENFIELD | MA |
| 2011-10-17 | 413-475-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | GREENFIELD | MA |
| 2014-02-28 | 413-475-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | GREENFIELD | MA |
| 2012-12-11 | 413-475-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MA | 892D | GREENFIELD | MA |
| 2017-02-22 | 413-475-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | GREENFIELD | MA |
| 2023-07-11 | 413-475-9XXX | 9000–9999 | Assigned | ONVOY, LLC - MA | 892D | GREENFIELD | MA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.